Aircast walking boot is a medical brace providing support, immobilization, and compression for foot, ankle, and lower leg injuries like fractures, sprains, and post-surgical recovery featuring a semi-rigid shell, adjustable air cells for swelling control, shock-absorbing technology, and a rocker sole to promote natural walking. Key features include customizable pneumatic compression via a hand pump for edema management, a ventilated design, and straps for a secure fit, with short versions for foot injuries and standard/elite versions for ankle/lower leg issues, often worn with a tall sock for comfort and hygiene.